From 1547a9094c11baf60bb19b1e6dcb22778ee05e11 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Tue, 26 Apr 2011 15:25:02 +0200 Subject: [PATCH 3/3] ALSA: hda - Enable sync_write workaround for AMD generically Backport for d507cd668a3f6d07 upstream. The workaround for AMD chipset via sync_write flag seems needed for machines with Realtek codecs. So, it's better to activate it generically in hda_intel.c from the beginning. Signed-off-by: David Henningsson Signed-off-by: Takashi Iwai --- sound/pci/hda/hda_intel.c | 11 +++++++++++ 1 files changed, 11 insertions(+), 0 deletions(-) diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c index 5fd012b..c9fb18e 100644 --- a/sound/pci/hda/hda_intel.c +++ b/sound/pci/hda/hda_intel.c @@ -1449,6 +1449,17 @@ static int __devinit azx_codec_create(struct azx *chip, const char *model) } } + /* AMD chipsets often cause the communication stalls upon certain + * sequence like the pin-detection. It seems that forcing the synced + * access works around the stall. Grrr... + */ + if (chip->pci->vendor == PCI_VENDOR_ID_AMD || + chip->pci->vendor == PCI_VENDOR_ID_ATI) { + snd_printk(KERN_INFO SFX "Enable sync_write for AMD chipset\n"); + chip->bus->sync_write = 1; + chip->bus->allow_bus_reset = 1; + } + /* Then create codec instances */ for (c = 0; c < max_slots; c++) { if ((chip->codec_mask & (1 << c)) & chip->codec_probe_mask) { -- 1.7.4.1